Rotary screen.



PATEN'I'ED MAY'5, 1908. D. P. PINDLEY. v ROTARY SCREEN. APPLICATION rum)MAY 14, 1907.

2 SHEETSSHEET 1.

ammonia:

attomwqo h u Lilli M No. 886,966. PATENTED MAY 5, 1908-. 1). P. PINDLEY.

ROTARY SCREEN.

APPLICATION FILED MAY 14, 1907.

2 SHEETS-SHEET 2.

1 z i6 66 27 I 96 3? D ED ?6 27 76 9 6 anuwito'c 7 RP. FzrzdZg,witheooca I Q 7n: NORRIS PETERS ca, wxsnmcmn, n. c.

DANIEL P. FINDLEY, OF MINERAL CITY, OHIO.

ROTARY SCREEN.

Specification of Letters Patent.

Patented May 5, 1908.

Application filed May 14, 1907. Serial No. 373,597.

T 0 all whom it may concern:

Be it known that I, DANIEL P. FINDLEY, a citizen of the United States,residing at Mineral City, in the county of Tuscarawas and State of Ohio,have invented certain new and useful Improvements in Rotary Screens, ofwhich the following is a specification.

This invention contemplates certain new and useful improvements inrotary screens for treating clay, cement, grain, or other comminuted,pulverulent or granular materials or substances, wet or dry, and theinvention has for its object a simple, durable and efficientconstruction of revoluble screen which will quickly separate fineparticles from the coarse, the latter being shunted by a separatedischarge passage or spout from the machine so as to be carried back tothe mill to be reground.

With this and other objects in view as will more fully appear as thedescription proceeds, the invention consists in certain constructions,arrangements and combinations of the parts which I shall hereinafterfully describe and then point out the novel features in the appendedclaims.

For a full understanding of the invention and the merits thereof andalso to acquire a knowledge of the details of construction of the meansfor efi'ecting the result, reference is to be had to the followingdescription and accompanying drawings; in which:

Figure 1 is a perspective view of my improved rotary screen; Fig. 2 is avertical sectional view thereof, parts being shown in side elevation;and, Fig. 3 is a horizontal sectional view on the line x-x of Fig. 2.

Corresponding and like parts are referred to in the followingdescription and indicated in all the views of the drawings by the samereference characters.

While the framework of my improved screening machine may be of anydesired form or construction, I have shown as one embodiment thereof,four upright posts 1 that are connected at their upper ends by end beams2 and by lower and upper sills 3 and 4.

5, 6, 7 and 8 designate shaft supporting beams, which form parts of theframew rk, and 9 designates an upper cross beam which is supported atits ends on the end beams 2. A cylindrical casing 10 is mounted withinthe framework, being directly supported upon the upper sills 4 and saidcasing is closed at its bottom by a base plate 11. This base plate 11 isformed with a concentric bed 12 which is preferably elevated above thebase plate, as shown and which is of less diameter than the base plate,so as to form an annular passage or chamber around the casing, and thesaid bed 12 is provided with an annular upwardly extending flange 13around its margin, as shown.

The annular body portion 14 of the sifting or screening drum is mountedto revolve around the flange 13 in suspended relation to the bed 12which forms the stationary bottom of the drum, and said body portion 14is secured to and carried by a spider 15 which is mounted fast on theupper end of the vertically extending shaft 16. This shaft 16 extendsdownwardly through the bed 12 and is j ournaled in a bearing 17 securedto the beam 5, the lower end of the shaft being mounted in a stepbearing 18 in the beam 6. The head 19 of the drum is formed of wiremesh, or other suitable foraminous or reticulated material, secured tothe two semi-circular frames 20 that are rabbeted around their edges, asindicated at 21, so as to fit within.

the body portion 14 and rest upon the arms of the spider 15.

A distributing pan 22 is supported centrally upon the head 19, beingpreferably secured to the cross bars of the frames 20, and said pan isintended to receive the material from any desired type of spout or hoper (not shown), and to distribute the materia evenly upon the surface ofthe sifting head 19, brushes 23 (two in number in the present instance)are suspended from arms 24 that are secured, as by shackle bolts 25 inthe u per cross beam 9 and said brushes preferab y contact with thesurface of the head 19 and preferably extend obliquely to the radius ofsaid head. By removingthe brushes, the head may be also removed, as itrests removably on the body portion 14 of the head, and inner portionsof the drum repaired or otherwise attended to, whenever necessary.

The bed 12 is formed with a discharge opening 26 for the sifted materialto pass therethrough, and through any desired form of spout into anyreceptacle designed to re ceive it. Blades 27 are secured to one or morearms of the spider 15 and depend therefrom so as to serve as revolubleconveyers or wings to carry the sifted material towards the ings on thebeams 7 and 8.

discharge opening 26, in the revolutions of the drum over the bed 12.Blades 28 are carried at any desired intervals by the annular bodyportion 14 of the sifting drum, said blades extending downwardly fromthe drum into the chamber formed between the bed 12 and thecylindrical.casing 10, so as to carry the coarser material around to an opening 29in the base plate 11, the said coarser material falling through saidopening and being carried away to be reground.

While it is obvious that the drum may be revolved by any desired means,either from the top or the bottom of the machine, I shall show in thepresent instance, for this purose, the shaft 16 as extending downwardly'rom .the drum and as provided with the gear wheel 30 which meshes witha pinion 31 on one end of a drive shaft 32 supported in bear- The driveshaft is provided at one end with a pulley 33 by which it may receiveits motion from any suitable source of power.

rom the foregoing description in connection with the accompanyingdrawings, it will be obvious that in the practical operation of themachine, the material to be sifted is deposited from any hopper or spoutupon the distributing pan 22 and is thence distributed evenly over thesifting surface or head 19 of the revolving drum. The finer materialwill pass through said head into the drum and be carried by the blades27 around to the discharge opening 26, while that material which is toocoarse to pass through the meshes or openings of the screen will befinally carried by centrifugal action out over the edge of the drum anddrop into the chamber between the drum and the casing 10 where it willbe conveyed by the revolving blades of the drum around to the dischargeopening 29.

casingexterior of the bed being formed with a discharge opening, onedlscharge opening being distinct from the other, a sifting headcomprising a screen and a frame to which the screen is attached, theframe fitting within and supported removably on the upper end ofthedrum, brushes supported in the frame work and adapted to engage withthe screen of said sifting head, and blades carried by said drum, as andfor the purpose set forth.

2. A machine of the character described,

comprising a supporting frame-work, a vertically eXtendmg shaft mountedtherein, means for rotating said shaft, a spider secured to said shaftand provided with radial arms, a drum secured to the ends of the saidarms, the casing being provided with a bed at the lower end of the drum,a screen carried in the upper end of the drum, blades secured to anddepending from the drum and projecting into the space between the bedand the casing, and other blades having a vertically adjustableconnection with the spider arms within the drum.

In testimony whereof I afiiX my signature in presence of two witnesses.

DANIEL P. FINDLEY. Witnesses:

THOMAS C. FERRELL, L. S. MCKINNEY.

